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ISSN Online: 2377-424X

ISBN Print: 978-1-56700-421-2

International Heat Transfer Conference 15
August, 10-15, 2014, Kyoto, Japan

Measurement of Kinetic and Enthalpy of Chemical Reaction in Biphasic Millifluidic Droplet Flow by InfraRed Thermography

Get access (open in a dialog) DOI: 10.1615/IHTC15.tpa.009281
pages 8279-8290

要約

The scope of this paper is to present the experimental study of a well known chemical reaction in a biphasic millifluidic droplet flow by using by InfraRed Thermography. This simple thermal evaluation enables the characterization of kinetics and enthalpy of exothermic chemical reactions. The originality of this work is the application of a very simple thermal model based on an homogenized thin body approximation to perform calorimetric estimations. This novel calorimeter needs a thermal calibration step to estimate the heat losses (W). Then, a correlation method is applied for the simultaneous estimation of the heat source (φ) and the characteristic coefficient due the convective effects (H). Here the estimation of the characteristic coefficient H (s−1) is done at each flow rate ratio (R). This procedure is applied for several chemical reaction performed at different flow rate ratios. Then, the enthalpy is estimated with an error lower than 2%. In addition, the methodology to estimate the mixing kinetics of the reaction can be pointed out by the integrated flux over the time. Finally, a non contact thermal calorimeter based on millifluidic and IR thermography was developed. It is a convenient and powerful tool for the characterization of chemical reaction performed in droplet flows.